For future reference if an Application is frozen or unresponsive, use Option+Command+Esc to Force Quit just that one App. Do not hold down the power button to shut down.
Have you tried going into Disk Utility and running Verify Permissions? You may have messed some things up by shutting down in that manner. Try that first and if there are issues, Repair Permissions, Restart, and try to open your DrScheme app again. Report back here.

16GB iPhone 5, 64GB Wi-Fi only iPad 1st Gen.

Reminder: Please include your Mac's specs. This will make it much easier for the other members to assist you.